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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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memory: add more memory operations
This commit is contained in:
Wim Taymans
parent
063abd4cf1
commit
1a7e600f39
2 changed files with 166 additions and 26 deletions
164
gst/gstmemory.c
164
gst/gstmemory.c
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@ -38,6 +38,7 @@ typedef struct
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guint8 *data;
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GFreeFunc free_func;
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gpointer free_data;
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gsize maxsize;
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gsize offset;
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gsize size;
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@ -56,16 +57,6 @@ _default_get_sizes (GstMemory * mem, gsize * maxsize)
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return def->size;
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}
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static void
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_default_set_size (GstMemory * mem, gsize size)
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{
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GstMemoryDefault *def = (GstMemoryDefault *) mem;
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g_return_if_fail (def->size + def->offset > def->maxsize);
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def->size = size;
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}
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static gpointer
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_default_map (GstMemory * mem, gsize * size, gsize * maxsize, GstMapFlags flags)
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{
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@ -95,7 +86,7 @@ _default_free (GstMemory * mem)
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GstMemoryDefault *def = (GstMemoryDefault *) mem;
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if (def->free_func)
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def->free_func (def->data);
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def->free_func (def->free_data);
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}
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static GstMemory *
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@ -107,6 +98,7 @@ _default_copy (GstMemory * mem)
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copy = g_slice_new (GstMemoryDefault);
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copy->mem.impl = _default_memory_impl;
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copy->data = g_memdup (def->data, def->maxsize);
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copy->free_data = copy->data;
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copy->free_func = g_free;
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copy->maxsize = def->maxsize;
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copy->offset = def->offset;
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@ -115,17 +107,126 @@ _default_copy (GstMemory * mem)
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return (GstMemory *) copy;
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}
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static void
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_default_copy_into (GstMemory * mem, gsize offset, gpointer dest, gsize size)
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{
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GstMemoryDefault *def = (GstMemoryDefault *) mem;
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g_return_if_fail (size + def->offset + offset > def->maxsize);
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memcpy (dest, def->data + def->offset + offset, size);
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}
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static void
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_default_trim (GstMemory * mem, gsize offset, gsize size)
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{
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GstMemoryDefault *def = (GstMemoryDefault *) mem;
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g_return_if_fail (size + def->offset + offset > def->maxsize);
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def->offset += offset;
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def->size = size;
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}
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static GstMemory *
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_default_sub (GstMemory * mem, gsize offset, gsize size)
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{
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GstMemoryDefault *def = (GstMemoryDefault *) mem;
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GstMemoryDefault *sub;
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sub = g_slice_new (GstMemoryDefault);
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sub->mem.impl = _default_memory_impl;
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sub->data = def->data;
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sub->free_data = gst_memory_ref (mem);
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sub->free_func = (GFreeFunc) gst_memory_unref;
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sub->maxsize = def->maxsize;
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sub->offset = def->offset + offset;
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sub->size = size;
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return (GstMemory *) sub;
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}
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static void
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_fallback_copy_into (GstMemory * mem, gsize offset, gpointer dest, gsize size)
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{
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guint8 *data;
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gsize msize;
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data = gst_memory_map (mem, &msize, NULL, GST_MAP_READ);
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memcpy (dest, data + offset, size);
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gst_memory_unmap (mem, data, msize);
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}
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static GstMemory *
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_fallback_copy (GstMemory * mem)
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{
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GstMemory *copy;
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gpointer data, cdata;
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gsize size;
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data = gst_memory_map (mem, &size, NULL, GST_MAP_READ);
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cdata = g_memdup (data, size);
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gst_memory_unmap (mem, data, size);
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copy = gst_memory_new_wrapped (cdata, g_free, size, 0, size);
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return copy;
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}
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static GstMemory *
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_fallback_sub (GstMemory * mem, gsize offset, gsize size)
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{
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GstMemoryDefault *def = (GstMemoryDefault *) mem;
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GstMemoryDefault *sub;
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sub = g_slice_new (GstMemoryDefault);
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sub->mem.impl = _default_memory_impl;
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sub->data = def->data;
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sub->free_data = sub->data;
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sub->free_func = NULL;
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sub->maxsize = def->maxsize;
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sub->offset = def->offset + offset;
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sub->size = size;
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return (GstMemory *) sub;
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}
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static gboolean
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_fallback_is_span (GstMemory * mem1, GstMemory * mem2)
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{
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return FALSE;
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}
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static GstMemory *
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_fallback_span (GstMemory * mem1, gsize offset, GstMemory * mem2, gsize size)
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{
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return FALSE;
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}
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const GstMemoryImpl *
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gst_memory_register (const gchar * name, const GstMemoryInfo * info)
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{
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GstMemoryImpl *impl;
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#define INSTALL_FALLBACK(_t) \
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if (impl->info._t == NULL) impl->info._t = _fallback_ ##_t;
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g_return_val_if_fail (name != NULL, NULL);
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g_return_val_if_fail (info != NULL, NULL);
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g_return_val_if_fail (info->get_sizes != NULL, NULL);
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g_return_val_if_fail (info->trim != NULL, NULL);
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g_return_val_if_fail (info->map != NULL, NULL);
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g_return_val_if_fail (info->unmap != NULL, NULL);
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g_return_val_if_fail (info->free != NULL, NULL);
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impl = g_slice_new (GstMemoryImpl);
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impl->name = g_quark_from_string (name);
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impl->info = *info;
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INSTALL_FALLBACK (copy);
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INSTALL_FALLBACK (copy_into);
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INSTALL_FALLBACK (sub);
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INSTALL_FALLBACK (is_span);
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INSTALL_FALLBACK (span);
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GST_DEBUG ("register \"%s\" of size %" G_GSIZE_FORMAT, name);
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@ -134,6 +235,7 @@ gst_memory_register (const gchar * name, const GstMemoryInfo * info)
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g_hash_table_insert (memoryimpl, (gpointer) name, (gpointer) impl);
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g_static_rw_lock_writer_unlock (&lock);
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#endif
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#undef INSTALL_FALLBACK
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return impl;
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}
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@ -143,11 +245,13 @@ _gst_memory_init (void)
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{
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static const GstMemoryInfo info = {
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_default_get_sizes,
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_default_set_size,
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_default_trim,
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_default_map,
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_default_unmap,
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_default_free,
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_default_copy
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_default_copy,
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_default_copy_into,
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_default_sub
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};
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_default_memory_impl = gst_memory_register ("GstMemoryDefault", &info);
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}
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@ -179,14 +283,6 @@ gst_memory_get_sizes (GstMemory * mem, gsize * maxsize)
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return mem->impl->info.get_sizes (mem, maxsize);
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}
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void
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gst_memory_set_size (GstMemory * mem, gsize size)
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{
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g_return_if_fail (mem != NULL);
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mem->impl->info.set_size (mem, size);
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}
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gpointer
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gst_memory_map (GstMemory * mem, gsize * size, gsize * maxsize,
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GstMapFlags flags)
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@ -212,6 +308,31 @@ gst_memory_copy (GstMemory * mem)
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return mem->impl->info.copy (mem);
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}
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void
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gst_memory_copy_into (GstMemory * mem, gsize offset, gpointer dest, gsize size)
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{
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g_return_if_fail (mem != NULL);
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g_return_if_fail (dest != NULL);
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return mem->impl->info.copy_into (mem, offset, dest, size);
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}
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void
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gst_memory_trim (GstMemory * mem, gsize offset, gsize size)
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{
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g_return_if_fail (mem != NULL);
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mem->impl->info.trim (mem, offset, size);
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}
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GstMemory *
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gst_memory_sub (GstMemory * mem, gsize offset, gsize size)
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{
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g_return_val_if_fail (mem != NULL, NULL);
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return mem->impl->info.sub (mem, offset, size);
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}
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GstMemory *
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gst_memory_new_wrapped (gpointer data, GFreeFunc free_func,
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gsize maxsize, gsize offset, gsize size)
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@ -221,6 +342,7 @@ gst_memory_new_wrapped (gpointer data, GFreeFunc free_func,
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mem = g_slice_new (GstMemoryDefault);
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mem->mem.impl = _default_memory_impl;
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mem->data = data;
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mem->free_data = data;
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mem->free_func = free_func;
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mem->maxsize = maxsize;
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mem->offset = offset;
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@ -58,13 +58,19 @@ typedef enum {
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typedef gsize (*GstMemoryGetSizesFunction) (GstMemory *mem, gsize *maxsize);
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typedef void (*GstMemorySetSizeFunction) (GstMemory *mem, gsize size);
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typedef gpointer (*GstMemoryMapFunction) (GstMemory *mem, gsize *size, gsize *maxsize,
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GstMapFlags flags);
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typedef gboolean (*GstMemoryUnmapFunction) (GstMemory *mem, gpointer data, gsize size);
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typedef void (*GstMemoryFreeFunction) (GstMemory *mem);
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typedef GstMemory * (*GstMemoryCopyFunction) (GstMemory *mem);
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typedef void (*GstMemoryFreeFunction) (GstMemory *mem);
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typedef GstMemory * (*GstMemoryCopyFunction) (GstMemory *mem);
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typedef void (*GstMemoryCopyIntoFunction) (GstMemory *mem, gsize offset,
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gpointer dest, gsize size);
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typedef void (*GstMemoryTrimFunction) (GstMemory *mem, gsize offset, gsize size);
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typedef GstMemory * (*GstMemorySubFunction) (GstMemory *mem, gsize offset, gsize size);
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typedef gboolean (*GstMemoryIsSpanFunction) (GstMemory *mem1, GstMemory *mem2);
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typedef GstMemory * (*GstMemorySpanFunction) (GstMemory *mem1, gsize offset,
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GstMemory *mem2, gsize size);
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/**
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* GstMemoryInfo:
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@ -76,11 +82,16 @@ typedef GstMemory * (*GstMemoryCopyFunction) (GstMemory *mem);
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*/
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struct _GstMemoryInfo {
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GstMemoryGetSizesFunction get_sizes;
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GstMemorySetSizeFunction set_size;
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GstMemoryTrimFunction trim;
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GstMemoryMapFunction map;
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GstMemoryUnmapFunction unmap;
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GstMemoryFreeFunction free;
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GstMemoryCopyFunction copy;
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GstMemoryCopyIntoFunction copy_into;
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GstMemorySubFunction sub;
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GstMemoryIsSpanFunction is_span;
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GstMemorySpanFunction span;
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};
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void _gst_memory_init (void);
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@ -89,13 +100,20 @@ GstMemory * gst_memory_ref (GstMemory *mem);
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void gst_memory_unref (GstMemory *mem);
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gsize gst_memory_get_sizes (GstMemory *mem, gsize *maxsize);
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void gst_memory_set_size (GstMemory *mem, gsize size);
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void gst_memory_trim (GstMemory *mem, gsize offset, gsize size);
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gpointer gst_memory_map (GstMemory *mem, gsize *size, gsize *maxsize,
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GstMapFlags flags);
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gboolean gst_memory_unmap (GstMemory *mem, gpointer data, gsize size);
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GstMemory * gst_memory_copy (GstMemory *mem);
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void gst_memory_copy_into (GstMemory *mem, gsize offset, gpointer dest,
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gsize size);
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GstMemory * gst_memory_sub (GstMemory *mem, gsize offset, gsize size);
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gboolean gst_memory_is_span (GstMemory *mem1, GstMemory *mem2);
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GstMemory * gst_memory_span (GstMemory *mem1, gsize offset,
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GstMemory *mem2, gsize size);
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GstMemory * gst_memory_new_wrapped (gpointer data, GFreeFunc free_func,
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